ALDH2 variance in disease and populations

Area of Science:

• Human Genetics
• Biochemistry
• Population Health

Background:

• The ALDH2*2 missense variant is a prevalent genetic polymorphism, particularly in East Asian populations.
• This variant is associated with alcohol flushing reactions and affects numerous human traits.
• ALDH2 deficiency is linked to increased susceptibility to aldehyde-associated diseases like cancer and cardiovascular disease.

Purpose of the Study:

• To clarify the interaction between alcohol consumption and ALDH2-related pathology.
• To investigate the evolutionary selection of the ALDH2*2 variant.
• To understand the disease risks, mechanisms, and potential protective effects of ALDH2 deficiency.

Main Methods:

• Analysis of genetic data for ALDH2*2 variant prevalence and selection.
• Review of clinical measurements, biomarkers, and lifestyle factors in ALDH2 variant carriers.
• Examination of associations between ALDH2 deficiency and aldehyde-associated diseases.

Main Results:

• The ALDH2*2 variant is the genetic polymorphism linked to the most human traits.
• ALDH2 deficiency affects nearly 8% of the global population, with high concentration in East Asians.
• Carriers exhibit altered biomarkers, clinical measurements, and increased susceptibility to certain diseases.

Conclusions:

• The precise interaction between alcohol and ALDH2 pathology requires further delineation.
• The ALDH2*2 variant's favorable selection suggests potential benefits, possibly related to alcohol use.
• Understanding ALDH2 deficiency is crucial for assessing disease risk and potential protective mechanisms.